Otani Kogyo. 

Otani Kogyo Co.,Ltd. produces and distributes a variety of essential overhead line equipment throughout Japan, serving power distribution, telecommunications, public address systems, and cable television (CATV) networks. Their extensive catenary hardware portfolio encompasses items like lightweight cross arms for suspending electrical wires on utility poles, scaffolding bolts for pole installation and removal, and diverse fittings for securing various apparatus to poles. They also supply a wide array of bolts, nuts, specialized CATV fittings for shared television services, and radio hardware for disaster preparedness. Additionally, the company undertakes the design, production, and sale of structural steel components and towers. This covers power transmission towers for supporting high-voltage lines, radio communication towers, and external steel frameworks for electrical substations, all managed through an integrated process. Their offerings further extend to mobile communication wireless towers, mounting systems for solar panels, and steel security fences. Otani Kogyo also offers maintenance and refurbishment services for existing, older infrastructure. Furthermore, they manufacture, sell, and install headed studs, which are vital for reinforcing steel and concrete constructions like buildings and bridges. They also provide seismic isolation base plates to enhance structural resilience. The company also performs hot-dip galvanizing to protect metal components. Established in 1946, the company's headquarters are located in Tokyo, Japan.